According to sources that spoke with AdWeek, the move will undo the decision in April to transfer creative work on Chevrolet to Publicis Worldwide. Ewanick, who was hired by GM earlier this month, used Goodby when he led marketing at Hyundai Motor America.

AdWeek also says that Campbell-Ewald is being rehired for Chevrolet retail and sponsorship work.

Publicis USA CEO Susan Giannino said she has heard nothing and is continuing its work on Chevrolet as planned. Goodby declined to comment.